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SC8164 参数 Datasheet PDF下载

SC8164图片预览
型号: SC8164
PDF下载: 下载PDF文件 查看货源
内容描述: 2.488千兆位/秒至2.7Gbit /秒1时16 SONET / SDH的多路分离器 [2.488 Gbit/sec to 2.7Gbit/sec 1:16 SONET/SDH Demux]
分类和应用:
文件页数/大小: 16 页 / 156 K
品牌: VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
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VITESSE  
SEMICONDUCTOR CORPORATION  
Preliminary Datasheet  
2.488 Gbit/sec to 2.7Gbit/sec  
1:16 SONET/SDH Demux  
VSC8164  
Package Thermal Considerations  
This package has been enhanced with a copper heat slug to provide a low thermal resistance path from the  
die to the exposed surface of the heat spreader. The thermal resistance is shown in the following table  
Table 4: Thermal Resistance  
Symbol  
Description  
°C/W  
Thermal resistance from  
junction to case.  
θ
1.34  
jc  
Thermal resistance from case to  
ambient with no airflow,  
including conduction through  
the leads.  
θ
25.0  
ca  
Thermal Resistance with Airflow  
Shown in the table below is the thermal resistance with airflow. This thermal resistance value reflects all the  
thermal paths including through the leads in an environment where the leads are exposed. The temperature dif-  
ference between the ambient airflow temperature and the case temperature should be the worst case power of  
the device multiplied by the thermal resistance.  
Table 5: Thermal Resistance with Airflow  
Airflow  
θ
ca (oC/W)  
100 lfpm  
200 lfpm  
400 lfpm  
600 lfpm  
21  
18  
16  
14.5  
Maximum Ambient Temperature without Heatsink  
The worst case ambient temperature without use of a heatsink is given by the equation:  
TA(MAX) = TC(MAX) P(MAX)θCA  
where:  
θ
Theta case to ambient at appropriate airflow  
Ambient Air temperature  
CA  
Τ
Τ
P
A(MAX)  
o
Case temperature (85 C for VSC8164)  
)
C(MAX  
Power (1.1 W for VSC8164)  
(MAX)  
Page 13  
VITESSE SEMICONDUCTOR CORPORATION  
741 Calle Plano, Camarillo, CA 93012 805/388-3700 FAX: 805/987-5896  
G52239-0, Rev. 3.3  
5/17/00